* {
    margin: 0;
    padding: 0;
}
* {
    box-sizing: border-box;
}
*::after {
    box-sizing: border-box;
}
*::before {
    box-sizing: border-box;
}
#html {
    word-break: break-all;
}
#div1 {
    position: fixed;
    right: 35%;
    top: 20px;
}
/* 为两个小球做准备 */
#div1::before {
    content: '';
    display: block;
    position: absolute;
}
#div1::after {
    content: '';
    display: block;
    position: absolute;
}
@media (max-width: 500px) {
    #html {
        height: 50vh;
        overflow: auto;
    }
    #div1Wrapper {
        height: 50vh;
    }
    #div1 {
        position: relative;
        top: 0;
        right: 0;
    }
}